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Analog Devices Inc./Maxim Integrated MAX16039PLA29+T
- Part No.:
- MAX16039PLA29+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Supervisors
- Package:
- 8-WFDFN
- Datasheet:
-
MAX16039PLA29+T.pdf
- Description:
- IC BATTERY BACKUP 2.93V 8-UDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,960
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Product details
Overview
The MAX16039PLA29+T from Maxim Integrated is an 8-pin μDFN battery-backup supervisory IC with active-low push-pull reset, battery-on (BATTON) indicator, and precision 2.93V reset threshold. It monitors VCC supply voltage, provides automatic switchover to backup battery during brownout, asserts BATTON high in backup mode, and operates down to 1.2V supply. It is used in portable POS terminals and real-time clock backup circuits requiring reliable low-power supervision.
For engineers reviewing the MAX16039PLA29+T datasheet, MAX16039PLA29+T pinout, MAX16039PLA29+T application, or MAX16039PLA29+T equivalent, key selection criteria include its 2.93V factory-set reset threshold, 8-pin μDFN-8 package, BATTON push-pull output capability, 13µA quiescent current at 3.6V, and -40°C to +85°C industrial temperature range.
Technical Context
The MAX16039PLA29+T implements a precision bandgap-based reset generator with 2.93V ±5% threshold (VTH = 2.85V to 3.00V), 140ms minimum reset timeout (tRP), and active-low push-pull RESET output. It integrates a dedicated BATTON output that drives high during battery-backup mode and features VCC-to-OUT and BATT-to-OUT MOSFET switching with on-resistance of 4.6Ω at 2.5V/25mA.
This variant belongs to the MAX16033–MAX16040 family and specifically supports battery-on indication without manual-reset (MR), watchdog (WDI), or auxiliary RESETIN inputs - confirmed by its 8-pin μDFN-8 pinout and functional grouping in the Selector Guide. Its power-fail comparator (PFI/PFO) remains fully operational with 1.235V threshold and 4µs propagation delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reset Threshold Voltage | 2.93V (factory-set, min 2.85V, max 3.00V) - ensures reliable reset assertion before 3.0V logic rails become unstable |
| Reset Timeout Period | 140ms (min), 280ms (max) - guarantees sufficient hold time for microprocessor initialization after power recovery |
| Quiescent Supply Current | 13µA (typ) at VCC = 2.8V - enables multi-year operation from coin-cell backup sources |
| Battery Backup Current | 1µA (typ) at VBATT = 2.8V, VCC = 0V - minimizes drain on backup battery during extended outage |
| Output Type | Active-low push-pull RESET and BATTON - eliminates need for external pull-up resistors and supports direct CMOS interfacing |
| Operating Temperature | -40°C to +85°C - qualified for industrial and embedded applications without derating |
| VCC Operating Range | 1.2V to 5.5V - supports supervision of 1.8V, 2.5V, 3.0V, 3.3V, and 5.0V systems from single supply |
Pinout & Package
Package: 2mm × 2mm, 8-pin μDFN (wettable flank), RoHS-compliant, lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - RESET | Active-low push-pull reset output | Asserts low when VCC < 2.93V, remains low ≥140ms after VCC recovery; sinks 20mA, compatible with standard µP reset inputs |
| 2 - PFI | Power-fail input | Monitors external supply via resistor divider; trips at 1.235V falling edge to trigger PFO and initiate early warning |
| 3 - GND | Ground reference | Primary return path for all internal circuitry and output drivers; requires low-impedance PCB connection |
| 4 - BATTON | Battery-on status indicator | Push-pull output driven high only during battery-backup mode; sinks 3.2mA @ 0.4V, usable for LED drive or pass-transistor control |
| 5 - PFO | Active-low power-fail output | Asserts low when PFI falls below 1.235V or VCC drops below reset threshold; 4µs delay ensures clean interrupt signaling |
| 6 - VCC | Main supply input | Accepts 1.2V–5.5V; powers internal circuitry and supplies OUT during normal operation; peak current rating 1A |
| 7 - OUT | Regulated system output | Sources from VCC when valid; switches to BATT during brownout; delivers up to 200mA with <4.6Ω on-resistance at 2.5V |
| 8 - BATT | Backup battery input | Connects to coin cell or supercap; enables automatic switchover when VCC < VTH and VCC < VBATT (40mV hysteresis) |
Key Features
| Feature | Design Value |
|---|---|
| Battery-On (BATTON) Indicator | Push-pull output asserted high exclusively during battery-backup mode - enables direct visual or logic-level status monitoring without external components |
| Precision Reset Threshold | 2.93V ±5% over -40°C to +85°C - ensures deterministic reset timing across industrial temperature range without calibration |
| Ultra-Low Quiescent Current | 13µA typical at 2.8V - extends coin-cell life to >10 years in always-on RTC backup applications |
| Integrated Power-Fail Comparator | 1.235V reference with 4µs PFI-to-PFO delay - provides early warning of supply degradation before main reset triggers |
| Robust Switchover Architecture | 40mV hysteresis between VCC and VBATT - prevents oscillation during slow VCC ramp-down and ensures clean transition to backup |
Applications
| POS Terminal Battery Backup | Real-Time Clock (RTC) Supervision |
|---|---|
Use Scenario: Maintaining SRAM and RTC state during AC power loss or battery replacement in retail point-of-sale terminals. IC Role / Device Role / Timing Role: Supervisory IC providing VCC monitoring, automatic BATT switchover, and BATTON status flag for firmware logging. Use Value: Prevents transaction data loss and clock drift by guaranteeing uninterrupted power to RTC/SRAM with <1µA backup current draw. |
Use Scenario: Preserving timekeeping accuracy and configuration memory in embedded systems during main supply interruption. IC Role / Device Role / Timing Role: Reset supervisor with precise 2.93V threshold and BATTON output to signal backup activation to host MCU. Use Value: Enables firmware to log power-fail events and enter low-power retention mode upon BATTON assertion, reducing wake-up latency. |
| Industrial Controller Brownout Protection | Set-Top Box Memory Retention |
Use Scenario: Ensuring deterministic reset and nonvolatile memory integrity in programmable logic controllers exposed to noisy 24VDC rails. IC Role / Device Role / Timing Role: Primary reset generator with 140ms timeout and power-fail warning (PFO) to trigger controlled shutdown sequences. Use Value: Eliminates spurious resets from transient dips via 100ns MR glitch immunity and 1.235V PFI comparator with 1% hysteresis. |
Use Scenario: Retaining channel lineup and user preferences in consumer set-top boxes during brief AC outages. IC Role / Device Role / Timing Role: Battery-backed power manager delivering regulated OUT to SRAM and asserting BATTON to enable EEPROM write-protection. Use Value: Reduces backup capacitor size requirement by 40% versus discrete solutions due to 4.6Ω BATT-to-OUT on-resistance and 1µA standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar supervisory circuit applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX16039PLA31+T | Factory-set reset threshold = 3.08V (3.00V–3.15V range); identical pinout, package, and BATTON functionality | Used where higher reset threshold is required to accommodate 3.3V rail tolerance or reduce false triggers on noisy supplies | Select when system VCC must remain above 3.0V for stable operation; same layout and firmware integration |
| TPS3808G33DBVR | 3.3V fixed reset threshold, no BATTON output, SOT-23-6 package, 1.8µA IQ, but lacks integrated battery switchover and PFI/PFO comparator | Applicable only for basic reset generation without backup management or power-fail warning capability | Choose only if battery backup and early power-fail detection are unnecessary; requires external circuitry for switchover |
Compared with MAX16039PLA31+T, the MAX16039PLA29+T offers tighter margin for 3.0V systems while maintaining identical timing and interface behavior; versus TPS3808G33DBVR, it delivers full battery-backup supervision in a single chip - eliminating four external components and enabling true zero-power retention.
Availability
MAX16039PLA29+T is available at Aetrix Electronics and suitable for portable POS equipment, real-time clock backup, and industrial controller brownout protection requiring stable component supply and long-term lifecycle support.
Supply support for MAX16039PLA29+T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for power management, sensing, and interface applications in industrial, computing, and communications markets.
The MAX16033–MAX16040 product line delivers ultra-low-power, small-footprint supervisory circuits with integrated battery switchover and status indication - engineered specifically for space-constrained, battery-backed embedded systems.
FAQ
What is the factory-set reset threshold voltage for the MAX16039PLA29+T?
The MAX16039PLA29+T has a factory-set reset threshold voltage of 2.93V, with guaranteed limits of 2.85V (minimum) and 3.00V (maximum) over the full -40°C to +85°C operating temperature range. This value is laser-trimmed during production and does not require external resistor networks. The MAX16039PLA29+T uses the "29" suffix code to denote this specific threshold within the MAX16033–MAX16040 family.
Does the MAX16039PLA29+T support battery backup switchover, and how does it behave?
Yes, the MAX16039PLA29+T supports automatic battery backup switchover. When VCC falls below the 2.93V reset threshold and VCC is at least 40mV lower than VBATT, the device disconnects VCC from OUT and connects BATT to OUT. In this mode, OUT is powered by the backup source, RESET is asserted low, and BATTON goes high. The MAX16039PLA29+T draws only 1µA from BATT (at 2.8V) in this state, preserving battery life.
What is the function of the BATTON pin on the MAX16039PLA29+T?
The BATTON pin on the MAX16039PLA29+T is a push-pull output that asserts high exclusively during battery-backup mode - i.e., when VCC is below the reset threshold and the device is sourcing power from BATT. It sinks 3.2mA at 0.4V saturation and can directly drive LEDs or base/gate electrodes of external pass transistors. Unlike open-drain alternatives, BATTON requires no pull-up resistor and provides unambiguous logic-level status indication.
Can the MAX16039PLA29+T be used without a backup battery?
Yes, the MAX16039PLA29+T can operate without a backup battery. In such configurations, connect BATT to GND and tie OUT directly to VCC. The device will still provide full reset supervision, power-fail warning (PFI/PFO), and BATTON functionality - though BATTON will remain low since battery-backup mode cannot activate. All other supervisory features, including 2.93V reset detection and 140ms timeout, remain fully functional.
What package type and dimensions does the MAX16039PLA29+T use?
The MAX16039PLA29+T is packaged in a 2mm × 2mm, 8-pin μDFN (micro Dual Flat No-lead) with wettable flanks, compliant with RoHS and lead-free requirements. Its compact footprint and thermal performance support high-density PCB layouts in portable and space-constrained applications. The pinout matches the MAX16037–MAX16040 series, and the package is rated for reflow soldering per JEDEC J-STD-020.
MAX16039PLA29+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-WFDFN
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- Battery Backup Circuit
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 2.93V
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- 140ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-µDFN (2x2)
MAX16039PLA29+T FAQ
1.How can I place an order for MAX16039PLA29+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16039PLA29+T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX16039PLA29+T reliable?
The price and inventory of MAX16039PLA29+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16039PLA29+T is usually 5 days.
3.What payment methods are accepted for MAX16039PLA29+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16039PLA29+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16039PLA29+T?
MAX16039PLA29+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16039PLA29+T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX16039PLA29+T?
For technical support, including MAX16039PLA29+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16039PLA29+T requirements.
6.How does Aetrix verify that MAX16039PLA29+T is sourced from the original manufacturer or authorized distributors?
All MAX16039PLA29+T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX16039PLA29+T meets industry standards.
7.What is the process for return or replacement of MAX16039PLA29+T?
All MAX16039PLA29+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX16039PLA29+T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX16039PLA29+T part is unused and in its original packaging.
Return procedure for MAX16039PLA29+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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